434 THE AMERICAN NATURALIST. | [VoL XXXIX. 
6. Paler, without black spot on snout à 7. 
7. Rosy or pinkish red with purplish UNE in ee region, becoming 
DH 
N 
e Pow 
sau 
xis 
gradually paler toward snout, which is white; intestinal region deep 
flesh-color, pale red, or yellowish ; accessory buccal glands wanting 
M. griffini Coe, S. 
. Salmon or flesh-color (rarely light, rosy brown); shading into lighter, 
with tinges of brighter red, or nearly white anteriorly ; intestinal lobes 
more deeply. colored, sometimes brown ; a cream-colored stripe is situ- 
ated in median ventral line; accessory buccal glands well developed 
M. alaskensis Coe, A, C, S. 
* CEREBRATULUS. 
Snout whitish both above and below, strikingly different from deep 
color of body í ie any | 
Snout not kitingly älteren: (oin body in olor à 3. 
. Body very long and ribbon-like, attaining a length d more on two 
meters ; deep blood-red, except tip of snout, which is yellowish white, 
above and below . à : C. montgomeryi Coe, B, A, P, B’, 85. 
Body long and ribbondike, very dark brown or reddish purple. except 
head, which is white on both dorsal and ventral surfaces, back about 
three fourths the length of the Mie: u or sometimes nearly 
or quite to the mouth . . albifrons Coe, A, P, C, 
Without distinct longitudinal à or transverse ee on body 4. 
With conspicuous transverse or longitudinal markings on bod 9. 
Black, brown, reddish brown, olive, or dark gray, sometimes with a 
lateral margins 5. 
Rosy flesh-color, TEE or bif: -heii paler pesia m land. 
nerves reddish and conspicuous in life, intestinal region cream-colored 
or pale buff ; body remarkably fragile. C. californiensis Coe, S, S’, 2 
Body long and ribbondike 3 ; i ‘ 
Body comparatively short and road i 8. 
Head very long and slender; nephridia vid very numerous rest 
ducts. 
Dark brown or purplish, paler on borders of cephalic furrows and tip of 
snout; head and anterior portions of body very slender, with remark- 
ably long and deep cephalic furrows . : . C. longiceps Coe, A. 
Head of moderate proportions, or short . 7. 
Slaty brown to grayish or pale olive, paler beneath sid often with con- 
spicuously paler or white lateral margins 
C. marginatus Renier, A, P, C, S, X, Y- 
Dark reddish brown; body very large and stout, becoming 2 meters or 
more in length and 25 mm. in width; head and cephalic furrows short 
C. herculeus Coe, A. 
Chestnut brown or reddish in esophageal region, chocolate brown pos- 
